Tag Archives: Webpagetest

Last week, I had the great privilege of presenting an O’Reilly webcast as part of the lead-up to Velocity Santa Clara. The catch was that I didn’t want to give away what I’ll be presenting at Velocity, so I needed to come up with a brand-new topic. I decided to talk about third-party scripts, for two reasons…

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If you’ve been following along with this site over the past four years, you may recall this post, which offered an introduction to waterfall charts. Given that the post is now a few years old, I think it merits a refresh.

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While TTI has improved since our last quarterly report, there is still a lot of room for improvement. To take a glass-half-full attitude, this represents a great opportunity for site owners who are ready to take the lead in delivering faster Time to Interact (TTI) for their shoppers.

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Web page speed tests of the top 20 holiday ecommerce sites – from Amazon to Zappos – showing huge disparities in site speed and page load time. I also demonstrate some new ways to visually present test results to make them meaningful to other stakeholders in your organization.

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I ran side-by-side performance tests of TechCrunch, Mashable, GigaOM, Technology Review, and the tech blogs for the New York Times and LA Times. My point: to illustrate why, if you’re looking at just the amount of time it takes for your pages to load, you may be focusing on the wrong thing.

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Five popular ASP.NET-based content management systems — Sitefinity, DotNetNuke, Ektron, Kentico, and Sitecore — are on the receiving end of some late-night voodoo science, as I compare how quickly their clients’ websites load.

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Anyone who has run dozens of tests on Webpagetest knows it is challenging/impossible to run and aggregate hundreds or thousands of web page test results. Travelocity has created an incredibly useful script that sits in front of its own instance of Webpagetest and automatically tests multiple landing pages every 10 minutes in perpetuity, then aggregates the results.

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It’s not enough to have a fast site. Time after time I see “high performance” sites that make the same mistake: having their most important content load dead last. Here’s a case study from Symantec.com.